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Series 240/241 Instruction Manual Table of Contents Sierra Series 900 Single & Dual Channel System Instruction Manual Part Number IM- 90- 1 0 7 /0 5 Revision D.1 5 Harris Court, Building L Monterey, CA 93940 (831) 373-0200 (800) 866-0200 Fax (831) 373-4402 ht tp :/ / www.s ie rr ain st ru me nt s. co m Sierra Instruments b.v. Bolstoen 30A 1046 [...]

Series 900 Single & Dual Instruction Manual Page 16 © COPYRIGHT SIERRA INSTRUMENTS 1994 No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language, in any form or by any means, electronic, mechanical, manual, or otherwise, or disclosed to t[...]

Series 900 Single & Dual Instruction Manual Page 15 1 . Introduction ............................................................................. 1 2. Locating System Electronics .................................................. 2 3. Front Panel Functions ............................................................ 3 3.1 Channel Selection ...[...]

Series 900 Single & Dual Instruction Manual Page 1 The Sierra Instruments, Inc. Single and Dual Channel System Electronics is a highly integrated systems solution to flow mea- surement and control. One or two independent flow meters or controllers can be operated simultaneously. Linear operation with LCD readout is standard. The back panel conn[...]

Series 900 Single & Dual Instruction Manual Page 2 The System Electronics should be located in a room-temperature location which is dry and dust-free. Use cable lengths in accor- dance with the guidelines given with your transducer. Excessive cable lengths will impair operation of both the System Electronics and the transducer. Extremes of temp[...]

Series 900 Single & Dual Instruction Manual Page 3 System Electronics’s front panel controls provide ease of opera- tion. To get the most benefit from a Sierra Instruments, Inc. System Electronics, read these instructions before attempting operation. On dual channel units, the rotary switch labeled Channel Select determines which channel is d[...]

Series 900 Single & Dual Instruction Manual Page 4 As the potentiometer is rotated the appropriate alarm setpoint is varied from zero to the full scale flow value and displayed in the front LCD display. The totalize option records the total mass flow. This value is indicated on the front panel electronic counter and is therefore immune to power[...]

Series 900 Single & Dual Instruction Manual Page 5 The AC power line connector (or power entry module) is located on the back panel. A cordset is supplied with the System Electronics and is compatible with wall outlets in the USA. Be sure System Electronics is wired for the proper power mains voltage, either 115 VAC, 60 Hz or 230 VAC, 50/60 Hz,[...]

Series 900 Single & Dual Instruction Manual Page 6 The VALVE PURGE function is activated by the VALVE TP (test point) pin. When this pin is connected to common, the valve is fully open regardless of setpoint. This pin must source 150 mA of current when driven to common. If a voltmeter is connected between this pin and –15 VDC, the voltage acr[...]

Series 900 Single & Dual Instruction Manual Page 7 Normally each System Electronics is carefully set-up at Sierra Instruments and needs no maintenance. Individual transducers may need periodic maintenance. Refer to transducer manuals for the proper procedure. The full scale value of the display can be adjusted using the Display Adjustment Poten[...]

Series 900 Single & Dual Instruction Manual Page 8 GENERAL System Electronics Powers/Reads up to two transducers. Flow, Setpoint, High Alarm, and Low Alarm directly displayed in engineering units. (Linear models). Outputs 0-5 volts and 4-20 mA for each channel. Valve control functions of Close/Purge/Monitor. Built-in 10 turn precision setpoint [...]

Series 900 Single & Dual Instruction Manual Page 9 APPENDIX B Back Panel Connector Pin Assignments; 20-Pin Transducer Connector KEY ▼ (View of connector from back of enclosure) PIN NO. FUNCTION PIN NO. FUNCTION A Setpoint Output to 1 Chassis Ground Controllers 2 Common B Common 3 0-5 Volt Signal from C Common Transducer D Valve Test Point 4 +[...]

Series 900 Single & Dual Instruction Manual Page 10 KEY ▼ APPENDIX C Back Panel Connector Pin Assignments; 26-Pin I/O Connector (View of connector from back of enclosure) PIN NO. FUNCTION PIN NO. FUNCTION A Channel 1, 0-5 Volt 1 Common Linear Output 2 Common B Channel 2, 0-5 Volt Linear Output 3 Common C Channel 1, Automatic 4 Common Setpoint[...]

Series 900 Single & Dual Instruction Manual Page 11 The alarms are a normally, open collector transistor outputs; that is, a transistor is used as a switch to ground. A “High” alarm means that if the flow signal is higher than the alarm trip setting, the transistor will be turned on. Conversely, a “Low” alarm activates the transistor wh[...]

Series 900 Single & Dual Instruction Manual Page 12 APPENDIX E Wiring Guide[...]

Ra ti o C o n t ro l O p ti o n Appendix F T he con st ant ra t io -c ont r ol op t ion (“- RC” in th e m od el co de ), pr ov i de s th e use r wi t h t he ab i lit y to set an d m ai nt ai n an exa ct rat i o of ga s f lo w be t we en t wo (or mo re ) m ass fl ow con tr ol l er s (M F Cs) . The con t ro l bo x ac com p li s he s t hi s by sca[...]

d. T urn of f t h e po we r swi t ch on th e f ro nt o f th e box, att a ch the cab l es and t he co ntr ol l er s (i f yo u h av en ’t alr ea dy do ne so ), an d t ur n t h e po we r o n. e. A pp l y gas pr es sur e to t he in let of t he con t ro l ler s per th e op er at i ng pre ss ur e li st e d on th e l ab el s. f . B ox sett i n gs: Set /[...]